Look at the due date.
Check for an expiration date, and if there is not one just smell it. It will have a foul smell if it's bad. If there is an expiration date, most products are good a week after that date, so just add a week to that date.
Fresh buttermilk is typically good for about 2 weeks before it spoils.
Fresh buttermilk typically lasts for about 2 weeks in the refrigerator before it spoils.
it can stay fresh for 2 weeks
24-36 hours if you plan on cooking it. If not, freeze it.
Forever
It will stay fresh for some hours. Not too long. So it depends how long the fridge been off. Too long is bad.
cod will stay fresh forever if you freeze it in a air tight bag.
buttermilk can last two weeks, but if it is opened it is best to use on the first week. although even after the expiration date you can still using for baking.
i would say brownies stay fresh for about 3-5 days if they are in a sealed container.
Weed stays fresh for a long time. You can put it in a plastic bag to keep it fresh for a long time or you can also freeze it.
two days
i don't think it will help the lifespan of the flowers